For example I am going through the source of some code, starting with main.cpp.
I can see that main.cpp includes "Cat.h", so I follow Cat.h and see that this header includes "Kitten.h", so I follow that, and so forth.
Essentially I want to see a tree structure of the src, so that it looks like this:
myProgram:
|_ Cat.h
| |_ Kitten.h
| |_ Animal.h
| |_ Organism.h
|_ Snake.h
| |_ Lizard.h
| |_ Organism.h
|_ Etc.h